<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>测试</title>
</head>

<body>
    <input type="checkbox" id="jack" value="Jack" v-model="checkedNames">
    <label for="jack">北京</label>
    <input type="checkbox" id="john" value="John" v-model="checkedNames">
    <label for="john">上海</label>
    <input type="checkbox" id="mike" value="Mike" v-model="checkedNames">
    <label for="mike">杭州</label>
    <br>

    <div id="app-4">
        <input type="radio" id="one" value="段嗣凯是傻瓜" v-model="picked">
        <label for="one">点我</label>
        <br>
        <input type="radio" id="two" value="段嗣凯是渣男" v-model="picked">
        <label for="two">点我</label>
        <br>
        <span>输出: {{ picked }}</span>

    </div>

    <div id="app-5">
        <select v-model="selected">
            <option disabled value="">请选择</option>
            <option>蛋糕</option>
            <option>披萨</option>
            <option>汉堡</option>
        </select>
        <br>
        <span>输出: {{ selected }}</span>
    </div>


    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
    <script src="app.js"></script>
</body>

</html>